Quote:
Originally Posted by Snuffleupagus
This is an image of large(140 meter or larger) near earth asteroids mapped by NASA. 1400 of them.
Good news is none of these are actually are expected to hit our planet in the next 100 years.
Bad news is they estimate they only found about 29% of large Earth-crossing asteroids so far.  |
What are they using to arrive at the 29% number, just the asteroid belt? Or are they including Kuiper Belt and Oort Cloud objects? Also, how are they estimating the unknown?